Apple has posted version 1.1 of their 2007-004 update released earlier this month. The new update corrects some bugs introduced in the first update (note: only affects very specific versions of Mac OS X, seen notes):

AirPort
Available for: Mac OS X v10.3.9
This update corrects an issue where the AirPort connection may be lost after waking from sleep. This issue only affects Mac OS X v10.3.9 with Security Update 2007-004.
FTPServer
Available for: Mac OS X Server v10.4.9
Security Update 2007-004 applied an incorrect ftp configuration file for Mac OS X Server v10.4.9 systems. Users with ftp access, who would normally be restricted to certain directories, may be able to access directories outside the normal scope.

Finally, Apple also released the Airport Extreme 2007-003 updater, which "is recommended for all Intel-based Macintosh computers and includes compatibility updates for certain third-party access points configured to use WPA or WPA2 security."

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